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Answer:


Explanation:
→ We want to simplify this expression:

◼ Simplify the multiplication:

◼ Simplify the addition:

Conclusion:
The expression 6 + 5 - 8 × 6y⁴ is equal to 11 - 48y⁴.
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→ We want to solve this equation:

◼ Subtract 6 from both sides:

◼ Simplify both sides:

◼ Divide both sides by -7:

◼ Simplify both sides:

Conclusion:
The solution of the equation 6 - 7u = 48 is -6.